Method of making hose ends



Feb. 28, 1950 COURTOT 2,499,241

METHQD OF MAKING HOSE ENDS Filed May 10, 1947 Efl fi7gafi INVENTOR.

LOU/6 5'. 6002707 4 TTOE'A/EKS fiatentecl Feb. 28 1950 OFFICE METHOD OF MAKING HOSE ENDS Louis B. Courtot, Cleveland Weatherhead Company,

poration of Ohio Ohio, assignor to The Cleveland, Ohio, a cor Application May 10, 1947, Serial No. 747,196 1 Claim. (Cl. 29-1483) This invention relates to composite hose ends or couplings of the type which are crimped or fastened to a hose and have means for connection to an associated coupling or fitting member. My invention also relates to a method of making a hose end or coupling of the type described.

It has been proposed to manufacture hose ends and coupling members of the type to which this invention relates in an economical manner by building the hose end up of several parts and fastening them together. Such a construction is often more economical than one wherein the coupling is machined from a solid blank end, furthermore, the composite construction permits use of materials for the various elements best adapted to withstand the service they encounter. However, it is preferable that the insert be retained in the shell before the hose is attached which normally requires an extra operation. Also, if the shell is tubular, one or more separate operations are required to provide a wrench-receiving exterior. It is an object of this invention to provide a coupling member that has all the advantages of a retained insert and wrenchreceiving portion, but which may be produced by a minimum of simple operations.

Briefly, in a preferred embodiment of my invention I produce a hose end by assembling a tubular sheet metal shell or body member with an insert member of hexagonal cross-section, the insert having corner portions of greater diameter than the nominal internal diameter of the tubular shell. By forming the insert with the beveled nose I may press it into the shell, which stretches the metal of the shell locally so that it assumes the configuration of the exterior of the insert. This retains the insert in the shell and provides an external wrench-receiving portion on the shell. I complete the assembly by crimping the rearward portion of the shell (through which the insert was pressed) about a hose member. Thus, not only am I able to form a composite hose end and make the insert and shell of materials suitable for their service, but I can assemble the parts quickly and economically. The single act of pressing in the insert not only retains it in the shell before assembly with the hose, but produces an external wrench-receiving portion on the shell. Another object resides in production of a coupling of the type described wherein the o wrench-receiving portion found on the shell is backed up so that it cannot collapse under tool pressure.

A more detailed description of my invention appears in connection with the drawings in which:

, vide adequate metal for the threads 3.

a hexagonal. head portion with the conventional manner.

7 ment with the shoulder 4 of 'semb'ly oi the'parts. A nipple or standpipe 29; is formed separately, by stamping or drawing, or on eyelet machines and attached to the insert. Nip- Fig. 1 is a partial section of the shell or body member after having a portion thereof being folded over and threaded, but before insertion of the insert member g 1 Fig. 2 is an external view of the insert member;

Fig. 3 is a section through the tubular body member taken on 3--3 of Fig. 1; p

- Fig. 4 is a section of the insert taken on 4 4 of Fig. 2; I I l I Fig. 5 is a partial section through the coupling after the insert has been pressed in the body;

Fig. 6 is a partial section through the coupling after it has been clamped about a hose; M

Fig. '7 is a section taken on 1-l of Fig. 6; and Fig. 8 is a section of a modified form.

As seen in Fig.1, the body or shell member S is made up of a length of cylindrical tubing l which has a portion 2 folded back thereon to pro- Theend of the folded back portion 2 forms a shoulder vll facing away from the threads against which the insert is abutted during assembly. The internal diameter 5 of the shell is made of proper size to receive the insert as willbe described in more detail presently.

Insert I includes a body ill preferably machined or turned from bar or hexagonal stock on automatic screw machinery. The finishedinsert has flats llbounded by corners l2. A forwardly facing conicalnose i3 is provided on the insert for fluid engagement with a flared, tube or other coupling 01 fitting member, threaded into threads 3 of the fitting'i'n A generally radial shoulder Ill is providedon the insert for engagethe shell S after asple 22! includes a'flange 2! which is welded, soldered, or brazed as at '23 to the insertpro'per. The insert and standpipe are apertured as at l6 and 22, respectively, to conduct fluid.

After the parts are formed as shown, the insert is pressed into the shell from the rear as shown in Fig. 5. The forward beveled portion i5 facilitates initial entry of the insert into the shell. I prefer that the inner diameter 5 of the shell be approximately equal to the diameter across the flats H of the hexagonal insert section, as illustrated by the dot-dash line in Fig. 4. Thus, when the insert is pressed into the shell, the corners of the insert expand and stretch the metal of the shell which, in turn, causes the shell to be in pressure engagement with and tightly grip and reapplied to a crimped [the art will appreciate that the principles of my 'with the production of hose ends 'or coupling tain the insert. If the sizes of the parts are properly selected, the shell will hug and press against the hexagonal section of the insert. After the radial shoulder 14 of the insert engages the shoulder 4 of the shell, initial assembly Of the hose end is completed. Not only is the insert firmly retained in place at this stage so that the unit can be handled and shipped before assembly with the hose, but the exterior wrench-receiving surfaces as shown in Figs. 6 and 7 are simultaneously provided on the shell without need of any further stamping, drawing or machining operations.

Although I prefer thatthe-diameter of the inscribed circle of the hexagonal insert equal the inner diameter of the shell, I contemplate that modifications may be made in the relationship of these diameters, the object being to so proportion the parts that th majority of the metal in the shell wall is locally stretched by the insert and is configured like it.

As seen in Fig.6, when it is desired to assemble the hose end with a hose H, standpipe 20 is inserted into the aperture 3| of the hose and portion '32 of the shell is crimped about the hose firmly retaining the insert in place thereon in fluid-tight relationship. I may crimp the shell insu'cha manner so that the rearward hexagonal portion that surrounds the hose is made substantially circular asshown at 34. In use, no leakage can occur regardless of the nature of the fit between the exterior of the insert and the shell because the conical nose [3 makes a fluid-tight engagement with the flaring tube or coupling member associated with the fitting and no fluid can leak out around the'exterior of the insert.

It is important to note that in my improved construction the corners of the wrench-receiving portion are backed up by the insert so that a tool or wrench cannot collapsethe shell corners and so damage the coupling.

Although, in the interests of economy and -"saving of material, I prefer to form the shell by doubling back a portion 2 which receives threads and forms a shoulder 4, I could use thicker ma- "terial throughout and roll or out threads in the Qforward end of the sleeve. mentis shown in Fig. 8 wherein the insert S1 is of heavier metal and threads 4| are formed in Such an arrange- "fa forward end portion of single '-thickness. Wrench-engaging corners 42 are formed on the -sleeve when the insert is assembledj'as described, and the rearward shell portion is crimped "hose H as shown at'-43. In either case an integral, thickened nipple portion is provided.

about Although I have illustrated my invention as hose end, those skilled' in invention may be employed in connection 4 members which do not have a rearward crimped portion.

Although I have illustrated a polygonal insert hexagonal in form, it will be understood that any regular polygonal section formed with suitable flats to provide wrench-receiving surfaces may be assembled with a sleeve in accordance with the principles of my invention without departing from its spirit.

I contemplate that various details of design and construction may be modified without departing from theessence of my invention and although I have described in detail a preferred embodiment I contemplate that the appended claims and not the described embodiment be determinative of the scope of my invention.

What is claimed is:

The method of making a hose end connector comprising producing a shell member by forming one end of a metallic tube which is circular in cross section and of uniform thickness into an integral threaded, thickened nipple portion providing an integral shoulder facing away from the threads, forming an insert having a head portion whose cross section is a regular polygon, the radius of an inscribed circle of said polygon being substantially equal to the internal radius of the tube portion of said shell, pressin said polygonal head axially into the tube portion of said shell and into engagement with said shoulder to expand the tube portion into a corresponding polygonal shape and into pressure engagement with the surface of the polygonal head.

LOUIS B. COURTOT.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,117,856 Kent Nov. 17, 1914 1,276,013 Beach Aug. 20, 1918 1,432,525 Bronson Oct. 17, 1922 1,479,358 Behringer Jan. 1, 1924 1,639,367 Cameron Aug. 16, 1927 1,875,130 Peck Aug. 30, 1932 1,887,168 Ruberstaugh Nov, 8, 1932 1,911,570 Holstein May 30, 1933 2,054,182 Unke Sept. 15, 1936 2,093,092 McElhany Sept. 14, 1937 2,216,833 Barry Oct. 8, 1940 2,314,002 Lusher Mar. 16, 1943 2,375,763 Blais May 15, 1945 2,430,921 'Edelmann Nov. 18, 1947 2,432,598 Weatherhead Dec. 16, 1947 FOREIGN PATENTS Number Country Date 427,661 Great Britain Apr. 29, 1935 

